The XY Ring: A Classic Sudoku Technique

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SPOILER: There is some detail on the technique Simon uses in the video at the very bottom of this video description!

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SPOILER: As the title of the video notes, the technique is called an XY-Ring. It shares some logic with techniques like an XY-Chain and a Continuous Nice Loop. We can cover these in other videos if there is interest.

Видео The XY Ring: A Classic Sudoku Technique канала Cracking The Cryptic